I'm looking for a big tap to re-tap a tranny fill bolt hole. I believe the bolt is M20 with a 2.5 thread pitch. I've called everyplace I can think of (Ace Hardware, Northern Tool and Equipment, Napa, Home Depot even . . . ) no one carries one that big.

Anyone happen to know a place that would carry something that size in Metric? I don't really even need the die, just the tap.

 

Have you tried Harbor Freight?

 

check with snan-on. I found the part number * D2025M * in the catalog. If that works be sure to use liquid teflon sealant to ensure no leaks.